<h2>DESCRIPTION</h2>

<em>v.in.pdal</em> supports the following PDAL filters:

<ul>
<li>groud detection with Point Cloud Library (PCL) Progressive Morphological Filter (Zhang 2003)
    (<a href="http://www.pdal.io/stages/filters.ground.html">filters.ground</a>)
<li><a href="http://www.pdal.io/stages/filters.height.html">filters.height</a>
    (requires PCL)
</ul>

<em>v.in.pdal</em> supports the following filters natively:

<ul>
<li>2D region filter
<li>Z coordinates filter
<li>return filter
<li>class filter
</ul>

<h2>EXAMPLES</h2>

Import only XYZ coordinates of points, limit the import to the current
computational region and reproject to the Location projection during
the import:
<div class="code"><pre>
v.in.pdal input=points.las output=points -c -r -w
</pre></div>

<h2>SEE ALSO</h2>

<em>
<a href="r.in.lidar.html">r.in.lidar</a>,
<a href="r3.in.lidar.html">r3.in.lidar</a>,
<a href="g.region.html">g.region</a>,
<a href="v.vect.stats.html">v.vect.stats</a>
<a href="v.in.ogr.html">v.in.ogr</a>,
</em>

<h2>REFERENCES</h2>

<ul>
<li>
    V. Petras, A. Petrasova, J. Jeziorska, H. Mitasova (2016):
    <em>Processing UAV and lidar point clouds in GRASS GIS</em>.
    XXIII ISPRS Congress 2016
    [<a href="http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B7/945/2016/">ISPRS Archives</a>,
    <a href="https://www.researchgate.net/publication/304340172_Processing_UAV_and_lidar_point_clouds_in_GRASS_GIS">ResearchGate</a>]
<li>Zhang, Keqi, et al.
    <em>A progressive morphological filter for removing nonground
    measurements from airborne LIDAR data.</em>
    Geoscience and Remote Sensing,
    IEEE Transactions on 41.4 (2003): 872-882.
</ul>

<h2>AUTHOR</h2>

Vaclav Petras,
<a href="http://geospatial.ncsu.edu/osgeorel/">NCSU GeoForAll Lab</a>

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